Wrench



(NoModeL) M. E. GAMPFIELD.

WRENCH.

No. 380,859. PatentedApr. 10, 1888.

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' it is adjusted by screw action.

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MATTHEWV E. OAMPFIELD, OF PITTSBURG, ASSIGNOR TO THE BROWN SPE- CIALTY MANUFACTURING COMPANY, OF ETN A, PENNSYLVANIA.

WRENCH.

' SPECIFICATION forming part of Letters Patent No. 380,859 dated April 10, 1888.

Application filed November 12, 1887. Serial No. 254,998. (No model.)

To all whom it may concern;

Be it known that I, MATTHEW E. CAMP- FIELD, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in \Vrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to combined nut and pipe wrenches-that is to say, to such as are adapted to be used both as nut and pipe wrenches; and it consists in the peculiar construction of one of the jaws, whereby it is adapted to grasp either a nut or a pipe,-as may be desired.

In the accompanying drawings, which illustrate my invention, the two figures represent side views of a wrench, Figure '1 showing the same applied to a pipe, and Fig. 2 to a nut.

The wrench illustrated belongs to the class known as rapid-transit wrenches, in which the movable jaw is slid backand forth by hand, in contradistinction to those in which The movable jaw and the means'for holding the same in adjusted position are the same as shown and described in. my patent, No. 371,302, dated October 11, 1887, and need not therefore be particularly described here. Suffice it to say that the shank A is toothed or serrated on that side or edge from which the jaws project, and that the movable jaw B carries a spring pressed dog, I), which engages the teeth or serrations on the shank. The teeth on the shank stand forward toward the head of the wrench and those on the dog stand in the opposite direction. This permits the movable jaw to he slid forward at all times, but prevents its backward movement until the dog is pressed out of engagement.

The fixedjaw O has two working faces which stand at an angle to each other, and one of which is plain and the other provided with a series of teeth, as represented. The plain face a, which with the movable jaw forms the nutwrench, stands at right angles to the shank A, and the face 0, which forms a part of the pipewrench, inclines forward at an angle of twenty-five degrees, more or less. The teeth on the face 0 stand toward the shank, and should be sufficiently sharp to bite into the pipe when the wrench is turned.

The operation of the wrench will be read ily understood from the drawings. The wrench being applied to a pipe, as represented in Fig.

1, by turning the handle (not shown) in the direction of the arrow the movable jaw B slides down over the pipe, whereby the fixed jaw O is drawn toward or against the same till its teeth out in and take a firm hold; then, when the jaw B can move no farther over the pipe a leverage will be exerted, whereby the pipe may be turned.

While I have shown and described the fixed jaw as being provided with the two faces 0 c, it is evident that the arrangement of the two jaws may be reversed-that is, the fixed jaw may be made plain or straight and the movable jaw formed with the two faces without departing from the spirit of the invention; also, the inclined face 0 may be arranged at the inner part of the jaw, next to the shank, as indicated in dotted lines in Fig. 1, and the plain right-angular face a at the outer end.

\Vhen used as a nut-wrench, the nut is grasped between the parallel faces of the two jaws, as represented in Fig. 2, the operation 8o being the same as in ordinary nut-wrenches. \Vhen used as a pipe-wrench, the pipe is grasped between the plain jaw in the inclined face of the opposite jaw, as represented in Fig. 1.

Having now described myinvention, I claim as new 1. A nut and pipe wrench comprising a fixed and a movable jaw, one of said jaws being formed with two working-faces which stand at an angle to each other, and one of said faces provided with grasping'teeth, the other jaw having a single straight face which is parallel to one of the faces of the doublefaced jaw and extends over both, substantially 5 as shown and described.

2. A nut and pipe wrench comprising a jaw and extends over the two faces a 0, subfixed and a movablejaw, the fixed jaw being stantially as shown and described. 10 formed with two working-faces, c c, the inner In testimony whereof I affix my signature in face, 0, being plain and at right angles to the presence of two witnesses.

5 shank, and the outer face, 0, being outwardly MATTHEW E. OAMPFIELD.

inclined and provided with grasping-teeth, Witnesses: and the movable jaw having a plain straight G. H. MCCARTHY, face which is parallel to the face 0 of the fixed l GEORGE WANNER. 

